Power supply device



FIG. 1 is a front view of a power supply device showing our new design;

FIG. 2 is a perspective view of FIG. 1;

FIG. 3 is a left view of FIG. 1;

FIG. 4 is a rear view of FIG. 1;

FIG. 5 is a right view of FIG. 1;

FIG. 6 is a top view of FIG. 1; and,

FIG. 7 is a bottom view of FIG. 1.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a power supply device, as shown and described. 